Charles lionel mabcus



Feb. 3, 1931. c. L. MARCUS 1,790,938

WALL CONS TRUCTIQN Filed June 15, 1929 INVENTOR. C an; 5 L1 OIIEL l ama/5 4 Q. 2/ v ATTORNEYfit Patented Feb. 3, 1931 UNITED STATES CHARLES LIONEL MARCUS, OF NEW YORK, N. Y.

WALL CON STRUGTION Application filed June 15, .1929. Serial No. 871,188.

This invention relates to wall construction. It is directed to 'a sound proofing veneer or surfacing for walls, ceilings and the like.

An object of this invention is to provide a rugged, durable and relatively inexpensive construction of the character described, which shall effectively prevent transmission of sound, be easy to apply to walls, ceilings and the like, and practical and efficient to a high degree.

ther objects of this invention will in part be obvious and in part hereinafter pointed out.

The invention accordingly consists in the features of construction, combinations of elements, and arrangement of parts which will be exemplified in the construction hereinafter described, and of which the, scope of application will be indicated in the following claims.

In the accompanying drawing, in which is shown one of the various possible illustrative embodiments of this invention,

The figure is a perspective view of a section of a wall having a veneer coating embodying the invention.

Referring in detail to the drawing, 10 designates a portion of a wall-of any suitable construction provided with a sound-proofing veneer or surfacing 11 embodying the invention. Said surfacing 11 comprises a layer 12 of hard, nonporous material of relatively low elasticity such as cement and the like, and preferably having an irregular, glossy outer surface 13. Spaced from said layer 12 as by bracing members 14 or in any other suitable manner, is a layer 15 of relatively soft sound absorbin material, such as plaster, mortarand the like, and thus interposing an air space 16 between said layers 12 and 15. Over said layer 15, is a layer 17 of small rough, hard, irregular objects such as rough pebbles, stones or the like, having a suitable binder. Said layer 17 may be covered by a coating of any suitable finishing material 18 to give the wall a decorative smooth outer surface.

Walls surfaced with a veneer 11 constructed as described above, will be substantially sound proof; that is, transmission of sound thru such walls, as from one room to another, is substantially eliminated. The

sound waves passing through layer 17 are broken up by the hard irregular surface of the pebbles or stones therein. The waves passing from layer 17 to layer 15 are refracted, due to the difference of elasticity of the media throu h which said waves pass. Some of the soun is also absorbed in passing through layer 15 and also in the air space 16. Whatever waves pass through said air space are reflected upon striking the hard glossy surface 13 of layer 12. The sound waves are thus absorbed, refracted and reflected in the veneer 11 and are thus prevented from passing thru wall 10.

t will now be understood that walls may be constructed entirely of the layers forming the veneer 11 or said veneer may be constructed as an integral sound-proofin facing for such walls, or may be applied as an irided surfacing for walls, ceilings and the It will thus be seen that there is provided a device in which the several objects of this invention are achieved, and which is well adapted to meet the conditions of practical use.

As various possible embodiments might be made of the above invention, and as various changes might be made in the embodiment set forth, it is to be understood that all matter herein set forth or shown in the accompanying drawing is to be interpreted as illustrative and not in a limiting sense.

Having thus described my invention, I claim as new and desire to secure by Letters Patent:

1. A sound-proof facing for a wall comprising an inner layer of relatively hard material, a layer of relatively soft material and a layer comprising irregular objects, said first and second mentioned layers being separated by an air space,

2. A sound-proof facing for a wall comprising a layer of hard material and a layer comprising irregular hard objects, said first layer having an irregular glossy surface adjacent said second layer.

3. In combination with a wall, a soundproof facing therefor, comprising a layer of small hard objects having rough irregular surfaces, a layer of material having different elasticity from that of said first layer and a layer of hard non-porous substance of relatively low elasticity.

5 4. A sound-proof facing for Walls and the like, comprising an outer layer of small hard objects having rough irregular surfaces, an ad'acent layer of material having an elasticlty difierent from that of said first layer and a layer of hard non-porous substance of relatively low elasticity, said last mentioned layer having a lossy irregular outer surface, said second and last mentioned layers being seyiarated by an air space. n testimony whereof I afiix my signature.

CHARLES LIONEL MARCUS. 

